Fig. 5
Temperature tests carried out at PTB–German Physikalisch-Technische Bundesanstalt (left)–using a 3 T Siemens Magnetom Verio (VB17) and a 12-channel head coil and at NIST–US National Institute of Standards and Technology (right)–using an Agilent 3 T small bore scanner. T1 was measured by IRSE, and T2 by SE. The measurements were performed on the final phantom (n = 1) at baseline. TE echo time. Other abbreviations as in Fig. 2